Hello, I just noticed that QV4L2 is not running from menu applications, and when it is run from bash this package is unstable responding in manjaro KDE. Some update affected package V4L2
[manjaro@manjaro-pc ~]$ qv4l2
Icon theme "ubuntu-mono-dark" not found.
Icon theme "Mint-X" not found.
Icon theme "elementary" not found.
[manjaro@manjaro-pc ~]$
and for qvidcap command:
[manjaro@manjaro-pc ~]$ qvidcap
Unsupported format: 'MJPG' Motion-JPEG
[manjaro@manjaro-pc ~]$